| Titre : |
Azo pigments for printing inks |
| Type de document : |
texte imprimé |
| Auteurs : |
N. Sekar, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 61-64 |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Azo colorants carry an azo functional group flanked by two sp2 hybridised carbon atoms. The azo functional group serves as a bridge for the flow of resonance between the donor and acceptor residues. Depending on the number of azo functions we have monoazo or disazor ortrisazo colorants. They are typically manufactured by a reaction sequence consisting of diazotisation of an aromatic amine and coupling on to a strongly nucleophilic aromatic and active methylene components. So when the starting aromatic amine (u, the diazo component) and coupling component are mentioned the structure of the azo colorant can be visualised. Diazocomponent-> coupling component represents the azo colorant the arrow stands for diazotised and coupled. For example CI pigments orange 5 can be represented as 2,4-dinitroaniline-> 2-naphtol. |
| Note de contenu : |
- Classification of azo pigments and their shade range
- Monoazo yellow pigments - non-metallised
- Disazo yellow pigments - non-metallized
- Monoazo orange pigments - non metallized and metallised
- Disazo orange pigments non-metallised
- Monoazo red pigments : non-metallized
- Monoazo red pigments : metallized
|
| Permalink : |
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in PAINTINDIA > Vol. LII, N° 4 (04/2002) . - p. 61-64
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Azo pigments for printing inks in PAINTINDIA, Vol. LII, N° 4 (04/2002)
